added inventory and stamina system

Assets/Scripts/WeaponViewmodel.cs

@@ -0,0 +1,29 @@
+using UnityEngine;
+
+/// <summary>
+/// Add to a weapon prefab to define how it sits in the player's hands.
+/// WeaponManager reads these values when the weapon is equipped.
+/// </summary>
+public class WeaponViewmodel : MonoBehaviour
+{
+    [Header("View Model Transform")]
+    public Vector3 positionOffset = new Vector3(0.2f, -0.25f, 0.45f);
+    public Vector3 rotationOffset = new Vector3(0f, 0f, 0f);
+    public Vector3 scale          = new Vector3(1f, 1f, 1f);
+
+    // Called by WeaponManager to apply these values
+    public void Apply()
+    {
+        transform.localPosition = positionOffset;
+        transform.localRotation = Quaternion.Euler(rotationOffset);
+        transform.localScale    = scale;
+    }
+
+    // Called by WeaponManager to sync back after gizmo editing
+    public void SyncFromTransform()
+    {
+        positionOffset = transform.localPosition;
+        rotationOffset = transform.localRotation.eulerAngles;
+        scale          = transform.localScale;
+    }
+}